3-[(4-Formylphenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid disodium salt

CAS NO.：5850-58-8
Empirical Formula: C17H13N2NaO9S2
Molecular Weight: 476.41
SAFETY DATA SHEET (SDS)

What is 3-[(4-Formylphenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid disodium salt?

Preparation

4-Aminobenzaldehyde diazo, and 4,5-Dihydroxynaphthalene-2,7-disulfonic acid?coupling.

Properties and Applications

colourful red blue light. Soluble in water is red. The strong sulfuric acid in blue, diluted into red; In the bright red precipitation appear in the hydrochloric acid; Sodium hydroxide solution for deep in the red.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
Standard	Light Fastness	Fading	Stain	Persperation Fastness	Fading	Stain	Fading	Stain
ISO	5	3	3	2	4-5

Safety information for 3-[(4-Formylphenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid disodium salt

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